About Myrmotherula unicolor (Ménétriés, 1835)
The unicolored antwren (scientific name Myrmotherula unicolor (Ménétriés, 1835)) measures 9 to 10 cm (3.5 to 3.9 in) long and weighs 6.5 to 8 g (0.23 to 0.28 oz). It is a smallish bird with a short tail. Adult males are almost entirely gray, with underparts lighter than their upperparts. The throat feathers of adult males have black bases and gray tips. Adult females have olive-brown upperparts, with a grayish tinge on the crown and nape, and yellowish brown uppertail coverts. Their wings are dark grayish brown, with reddish yellow-brown edges on the flight feathers. Their tail is reddish yellow-brown. Adult females have a whitish throat, and mostly olive-buff underparts that are grayer on the sides and flanks. Their crissum is brownish yellow. The unicolored antwren is an Atlantic Forest bird. It is found along coastal southeastern Brazil, from northern Rio de Janeiro state south into northern Rio Grande do Sul. It inhabits the understorey to mid-storey of evergreen forest and mature secondary forest. In a small number of areas, it also occurs in restinga woodlands that grow on white-sand soils. It favors dense viny understory in somewhat stunted forest with a canopy up to about 20 m (70 ft) high. It occurs at elevations ranging from sea level to about 500 m (1,600 ft).
